Cathode active material and fluoride ion battery

Abstract

A main object of the present disclosure is to provide a novel cathode active material that can be used in a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used in a fluoride ion battery, the cathode active material comprising: a composition represented by Pb 2 MF 6 , in which M is at least one of Mn, Fe, Co, and Ni.

What is claimed is: 
     
       1. A fluoride ion battery comprising:
 a cathode active material layer, an anode active material layer, and an electrolyte layer formed between the cathode active material layer and the anode active material layer; 
 wherein the cathode active material layer contains a cathode active material including a composition represented by Pb 2 MF 6 , in which M is at least one selected from the group consisting of Mn, Fe, Co, and Ni. 
 
     
     
       2. The fluoride ion battery according to  claim 1 , wherein the cathode active material comprises a peak at a position of 2θ=27.1°±1.0° and 31.3°±1.0° in an X-ray diffraction measurement using a CuKα-ray. 
     
     
       3. The fluoride ion battery according to  claim 1 , wherein M is at least Mn. 
     
     
       4. The fluoride ion battery according to  claim 1 , wherein M is at least Fe. 
     
     
       5. The fluoride ion battery according to  claim 1 , wherein M is at least Co. 
     
     
       6. The fluoride ion battery according to  claim 1 , wherein M is at least Ni.